Montezuma, CO 80475 Frost Dates
Frost dates for Montezuma, CO, ZIP 80475
Typically, the last spring freeze lands around 06/15, roughly 291 days out. The first fall frost typically arrives around 09/09, about 84 frost-free days later.
Zone 5b (-15 to -10°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Montezuma, not a forecast for this year.
What to do before the first frost
Zone 5b around Montezuma has about 2 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
How much risk comes with planting early here
06/15 is the middle of 30 years of NOAA records, not a promise. Plant by 06/01 and you're betting against frost in roughly 9 years out of 10. 06/30 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Montezuma compares
At roughly 84 frost-free days, Montezuma places 40,010 of 40,283 ZIP codes in this dataset. Within CO, it ranks 564 of 624.
Learn more
zone vs. frost date explains why Zone 5b and Montezuma's frost date answer different questions, and the frost range explains how to read the range around Montezuma's dates instead of trusting one.